Research On Bearing Capacity Of Reinforced Concrete Beam Strengthened With CFRP

CFRP technology development so far, its excellent performance engineering construction industry has brought great benefits, and constantly sought after by the industry, its research and development potential immeasurable. CFRP and concrete by adhesive bonding, collaborative force, by the characteristics of high-strength carbon fiber cloth for reinforcement structure provides constraints to improve the bearing capacity of reinforced structure, improve the stiffness and ductility of the structure.First, the significance of reinforcement are described, analyzed the causes of aging structures, inadequate bearing capacity of its industry status quo, especially on the development of CFRP law were introduced in recent years, and proposed research direction and research methods.Secondly CFRP theoretical analysis method, the basic principles of reinforcement, reinforcement beams analyzed failure characteristics, according to the material constitutive introduced CFRP reinforced concrete beams bearing capacity calculation methods. And introduces the concepts of finite element method, as well as theoretical knowledge of finite element method. Software based on the finite element modeling of three reinforced concrete finite element model, introduced in nature, each material constitutive relation and failure criterion, introduced concrete solid element simulation of concrete, steel rod cell simulation, simulation CFRP theory-based membrane unit and analog rigid bearer ordinary physical unit.Then use finite element software to simulate the literature test model, the simulation of selected five reinforced concrete simply supported beam, after the end of the calculation of the results were analyzed. Analysis of the maximum load and the concrete compressive strain, the relationship between the beam span deflection, steel, carbon fiber cloth between the maximum tensile strain, and on this basis to study the concrete strength, reinforcement ratio (stirrup ratio), CFRP paste form, cross-cutting impact than the amount of reinforcement, environmental temperature on bearing capacity of reinforced beams.Finally, the simulation results are analyzed and summarized, and the future development direction of CFRP prospected.